Classic lashes are 1 extension glued to 1 natural lash. They are thicker to give the mascara look. Volume lashes are multiple extensions glued to 1 natural lash and each weigh much less than 1 classic lash. This gives us the ability to create softer, wispier, voluminous lash looks much like strip lashes. Both styles can be any length you choose giving us a large variety of styles.